Analysis

  • max time kernel
    150s
  • max time network
    137s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250313-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250313-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/03/2025, 07:55

General

  • Target

    78b8cd9ed9cdfe32f62396f1546c0739b66cf15c8ef5a71d5858358295fc8b15.dll

  • Size

    2.2MB

  • MD5

    cc66527f0069ca11c2f1f51411135199

  • SHA1

    4e3d3f90abc13e451822f20a943a158d5ed1d207

  • SHA256

    78b8cd9ed9cdfe32f62396f1546c0739b66cf15c8ef5a71d5858358295fc8b15

  • SHA512

    71e028b43aca70c2c06fa16226d71602121b3bb78806c098386ebd6d4e255875f498c0861f908ee723139ea8b448f73cc6de1afb3b0c8dff7e3ac77273029133

  • SSDEEP

    49152:L2cV7CFHgGbWJsUqtmNaOhVYcSUuamW5zo76e7+7WVuSwiPSCmDS+5uSlZLun40:NxOAGbWuUmmNaMVrSU735zoWe7+7WGu

Malware Config

Extracted

Family

valleyrat_s2

Version

1.0

C2

154.44.8.39:443

154.44.8.39:80

154.44.8.39:8011

Attributes
  • campaign_date

    2025. 3. 7

Signatures

  • ValleyRat

    ValleyRat stage2 is a backdoor written in C++.

  • Valleyrat_s2 family
  • Blocklisted process makes network request 3 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Using powershell.exe command.

  • Enumerates connected drives 3 TTPs 22 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Enumerates processes with tasklist 1 TTPs 6 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 25 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Delays execution with timeout.exe 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\78b8cd9ed9cdfe32f62396f1546c0739b66cf15c8ef5a71d5858358295fc8b15.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4472
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\78b8cd9ed9cdfe32f62396f1546c0739b66cf15c8ef5a71d5858358295fc8b15.dll,#1
      2⤵
      • Blocklisted process makes network request
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3876
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /B /c "C:\Users\Admin\AppData\Local\Temp\\monitor.bat"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2252
        • C:\Windows\SysWOW64\tasklist.exe
          tasklist /FI "IMAGENAME eq rundll32.exe"
          4⤵
          • Enumerates processes with tasklist
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:4460
        • C:\Windows\SysWOW64\findstr.exe
          findstr /I "rundll32.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:4372
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 30 /nobreak
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:6000
        • C:\Windows\SysWOW64\tasklist.exe
          tasklist /FI "IMAGENAME eq rundll32.exe"
          4⤵
          • Enumerates processes with tasklist
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:4792
        • C:\Windows\SysWOW64\findstr.exe
          findstr /I "rundll32.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:5956
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 30 /nobreak
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:5744
        • C:\Windows\SysWOW64\tasklist.exe
          tasklist /FI "IMAGENAME eq rundll32.exe"
          4⤵
          • Enumerates processes with tasklist
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:1424
        • C:\Windows\SysWOW64\findstr.exe
          findstr /I "rundll32.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:4572
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 30 /nobreak
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:5380
        • C:\Windows\SysWOW64\tasklist.exe
          tasklist /FI "IMAGENAME eq rundll32.exe"
          4⤵
          • Enumerates processes with tasklist
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:3296
        • C:\Windows\SysWOW64\findstr.exe
          findstr /I "rundll32.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2640
        • C:\Windows\SysWOW64\rundll32.exe
          "C:\Windows\SysWOW64\rundll32.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:3720
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 30 /nobreak
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:4940
        • C:\Windows\SysWOW64\tasklist.exe
          tasklist /FI "IMAGENAME eq rundll32.exe"
          4⤵
          • Enumerates processes with tasklist
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:1752
        • C:\Windows\SysWOW64\findstr.exe
          findstr /I "rundll32.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:5388
        • C:\Windows\SysWOW64\rundll32.exe
          "C:\Windows\SysWOW64\rundll32.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:4496
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 30 /nobreak
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:3300
        • C:\Windows\SysWOW64\tasklist.exe
          tasklist /FI "IMAGENAME eq rundll32.exe"
          4⤵
          • Enumerates processes with tasklist
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:4604
        • C:\Windows\SysWOW64\findstr.exe
          findstr /I "rundll32.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:5996
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /C powershell -Command "Set-ExecutionPolicy Unrestricted -Scope CurrentUser"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:5472
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell -Command "Set-ExecutionPolicy Unrestricted -Scope CurrentUser"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:3564
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /C powershell -ExecutionPolicy Bypass -File C:\Users\Admin\AppData\Local\updated.ps1
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:5728
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell -ExecutionPolicy Bypass -File C:\Users\Admin\AppData\Local\updated.ps1
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:2952

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

    Filesize

    2KB

    MD5

    74beabd4347b1ecc24fdc6cd9bb2ec64

    SHA1

    b793909bd2bf91d40eafb71194cc3eeb0c057110

    SHA256

    80d19c23e407ccffe9f5b43087c752b2157294a1e42d887705b9924ceb9e6af9

    SHA512

    f36be6d71e6ae79ffa79e9bc8d57e79cc14ace932fcc2106ab4df8f4ba99506dac3c007d986dfe3bf8884977a411ba1faa713489dc27b25c23bec49d42abd802

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    20KB

    MD5

    6e7ba77eb425b0cfba3365928e21eb56

    SHA1

    a9f0f3f094e776a556317c7d4708ba8161abc269

    SHA256

    9c743be6984bc766b477d568003273962b14895ac13042ecf91a6043465c8e22

    SHA512

    1bea1301f925784c12caf6202f50966d649e2a3d4fe6617c30dd50434e0ad463a6f49242c30aeb98892d0de8d0aa308c2906dbbef575fde042c0d6a6a0e5da21

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ngthtwe2.yhg.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\monitor.bat

    Filesize

    721B

    MD5

    a8795b0c718e389335caa55d74cbdb69

    SHA1

    d511c944c9552769c23254a6e4c503fd1aa43cfe

    SHA256

    97ab5b43ce973c01dde10b088372de3612b5bd65adc8b6a402e709e2e7c6b29b

    SHA512

    f69967863c6d7e49bf55c96ce7d24199ca2b0d4d5cbd1be9b8616e9025bdd1573f47d6bb4e5925a20e3e3647a0178a5097e391448dec0f0fa9690272a4d09cc3

  • C:\Users\Admin\AppData\Local\updated.ps1

    Filesize

    151B

    MD5

    aa0e1012d3b7c24fad1be4806756c2cf

    SHA1

    fe0d130af9105d9044ff3d657d1abeaf0b750516

    SHA256

    fc47e1fa89397c3139d9047dc667531a9153a339f8e29ac713e518d51a995897

    SHA512

    15fae192951747a0c71059f608700f88548f3e60bb5c708b206bf793a7e3d059a278f2058d4ac86b86781b202037401a29602ee4d6c0cbaaff532cef311975f4

  • memory/2952-79-0x000000006F8C0000-0x000000006FC14000-memory.dmp

    Filesize

    3.3MB

  • memory/2952-61-0x0000000006E40000-0x0000000006E62000-memory.dmp

    Filesize

    136KB

  • memory/2952-60-0x0000000006DC0000-0x0000000006DDA000-memory.dmp

    Filesize

    104KB

  • memory/2952-59-0x00000000078A0000-0x0000000007936000-memory.dmp

    Filesize

    600KB

  • memory/2952-73-0x0000000007EF0000-0x0000000008494000-memory.dmp

    Filesize

    5.6MB

  • memory/2952-56-0x00000000068B0000-0x00000000068CE000-memory.dmp

    Filesize

    120KB

  • memory/2952-57-0x00000000068E0000-0x000000000692C000-memory.dmp

    Filesize

    304KB

  • memory/2952-78-0x000000006F120000-0x000000006F16C000-memory.dmp

    Filesize

    304KB

  • memory/3564-36-0x0000000005E30000-0x0000000005E96000-memory.dmp

    Filesize

    408KB

  • memory/3564-74-0x00000000069F0000-0x0000000006A0E000-memory.dmp

    Filesize

    120KB

  • memory/3564-89-0x0000000007960000-0x0000000007971000-memory.dmp

    Filesize

    68KB

  • memory/3564-77-0x00000000077D0000-0x00000000077DA000-memory.dmp

    Filesize

    40KB

  • memory/3564-76-0x0000000007DB0000-0x000000000842A000-memory.dmp

    Filesize

    6.5MB

  • memory/3564-75-0x0000000007680000-0x0000000007723000-memory.dmp

    Filesize

    652KB

  • memory/3564-32-0x0000000004ED0000-0x0000000004F06000-memory.dmp

    Filesize

    216KB

  • memory/3564-33-0x0000000005600000-0x0000000005C28000-memory.dmp

    Filesize

    6.2MB

  • memory/3564-34-0x00000000053A0000-0x00000000053C2000-memory.dmp

    Filesize

    136KB

  • memory/3564-62-0x0000000007440000-0x0000000007472000-memory.dmp

    Filesize

    200KB

  • memory/3564-35-0x0000000005540000-0x00000000055A6000-memory.dmp

    Filesize

    408KB

  • memory/3564-63-0x000000006F120000-0x000000006F16C000-memory.dmp

    Filesize

    304KB

  • memory/3564-47-0x0000000005EA0000-0x00000000061F4000-memory.dmp

    Filesize

    3.3MB

  • memory/3876-21-0x0000000010000000-0x0000000010024000-memory.dmp

    Filesize

    144KB

  • memory/3876-22-0x0000000010000000-0x0000000010024000-memory.dmp

    Filesize

    144KB

  • memory/3876-15-0x00000000028F0000-0x0000000002922000-memory.dmp

    Filesize

    200KB

  • memory/3876-14-0x0000000010000000-0x0000000010024000-memory.dmp

    Filesize

    144KB

  • memory/3876-17-0x00000000029B0000-0x00000000029E8000-memory.dmp

    Filesize

    224KB

  • memory/3876-16-0x00000000029B0000-0x00000000029E8000-memory.dmp

    Filesize

    224KB

  • memory/3876-19-0x00000000029B0000-0x00000000029E8000-memory.dmp

    Filesize

    224KB

  • memory/3876-13-0x0000000010000000-0x0000000010024000-memory.dmp

    Filesize

    144KB

  • memory/3876-20-0x00000000029B0000-0x00000000029E8000-memory.dmp

    Filesize

    224KB

  • memory/3876-18-0x00000000029B0000-0x00000000029E8000-memory.dmp

    Filesize

    224KB

  • memory/3876-31-0x00000000029B0000-0x00000000029E8000-memory.dmp

    Filesize

    224KB

  • memory/3876-30-0x00000000029B0000-0x00000000029E8000-memory.dmp

    Filesize

    224KB

  • memory/3876-24-0x0000000003B10000-0x0000000003B3F000-memory.dmp

    Filesize

    188KB

  • memory/3876-12-0x0000000010000000-0x0000000010024000-memory.dmp

    Filesize

    144KB

  • memory/3876-10-0x0000000010000000-0x0000000010024000-memory.dmp

    Filesize

    144KB

  • memory/3876-23-0x00000000029B0000-0x00000000029E8000-memory.dmp

    Filesize

    224KB

  • memory/3876-11-0x0000000000B10000-0x0000000000B2D000-memory.dmp

    Filesize

    116KB

  • memory/3876-4-0x0000000010000000-0x0000000010024000-memory.dmp

    Filesize

    144KB

  • memory/3876-97-0x00000000029B0000-0x00000000029E8000-memory.dmp

    Filesize

    224KB

  • memory/3876-99-0x00000000029B0000-0x00000000029E8000-memory.dmp

    Filesize

    224KB